Re: [Ssh-sftp-perl-users] Net::SSH::perl to chroot enviro

[John F. <joh...@zn...>]

FYI  
Answer-
How to use Net::SSH::Perl  to run chrooted commands on remote server.

Rules:
1) you have to login as root, not the user
2) with each command you must run chroot as part of the command <see 
example> to get a command running inside the chroot enviro
3) you must use absolute pathnames, even for well-known commands
4) you still have to be careful about the environment and  shell - it 
doesn't act like a normal bash shell you reach manually

Code snippet:
use strict;
use diagnostics;
use Net::SSH::Perl;

my $cmd = "/usr/sbin/chroot  /home/username/buildenv/potato  myscript 
param param param"  ;
# myscript runs with the potato directory as its root
my $ssh = Net::SSH::Perl->new($host, debug => 10, protocol => 2);
 
# using code from instructions...
 $ssh->login($user, $pass);
 my($out, $err, $exit) = $ssh->cmd($cmd);
 print("\n  " . $out1 ) if $out1;


Why would anyone want  to do this?
I build multiple  large images on a remote Linux server nightly. I wrote 
a script to extract them from cvs, and build in a special build 
environment. ( the server runs a different Linux from the builds)
I version control the build environment itself, so that various releases 
are tied to a controlled version of Linux. Each developer and I get to 
choose which environment we build in, depending on which release we are 
working on, latest or bug fixes. Sometimes I have to tarball the whole 
build enviro and give it to a customer, too. We used to keep removable 
hard drives for each flavor, but now we use multiple chroot environments 
on a bigger server.

thanks
John


----------------------------------------------------
John P. Fisher
at ZNYX Networks
805  683 1488  x 3245
joh...@zn...